Reputation-based Blockchain Sharding Consensus Scheme

Sharding is a technology that solves the problem of blockchain capacity expansion.However, sharding may make it ea-sier for malicious nodes to be concentrated in a single shard, thus hindering the safe operation of the entire system.This paper proposes a reputation-based sharding consensus protocol（RBSCP）,which establishes a reputation mechanism to measure node behavior and encourage nodes to follow the protocol.The reputation level-based sharding method reduces the difference in the reputation level distribution in different shards, so as to prevent malicious nodes from concentrating on a single shard to do evil.A double-chain model combining verification chain and record chain is proposed.Through the differentiated storage of transactions, the storage capacity of the blockchain is expanded while the security of the blockchain is improved.By associating the vo-ting shares with the node reputation and differentiating the node commitments, a reputation-based fast Byzantine fault tolerance（RFBFT） algorithm is p